package com.heima.gateway.filter;

import com.heima.common.util.AppJwtUtil;
import io.jsonwebtoken.Claims;
import org.apache.commons.lang3.StringUtils;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Component
public class AuthFiller implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        try {
            //判断是否为登录请求，如果是就放行
            if (request.getURI().getPath().contains("/login")) {
               return chain.filter(exchange);
            }
            String token = request.getHeaders().getFirst("token");
            if (StringUtils.isEmpty(token)) {
                response.setStatusCode(HttpStatus.UNAUTHORIZED);
                return response.setComplete();
            }
            Claims claims = AppJwtUtil.getClaimsBody(token);
            int verifyToken = AppJwtUtil.verifyToken(claims);
            if(verifyToken==-1||verifyToken==0){
                request.mutate().header("userId",claims.get("userId").toString());
                request.mutate().header("userName",claims.get("userName").toString());
                return chain.filter(exchange);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        response.setStatusCode(HttpStatus.UNAUTHORIZED);
        return response.setComplete();
    }

    @Override
    public int getOrder() {
        return 0;
    }
}
